build: Fixed generation when source file names contain spaces

This shouldn't happen with the source files in the repository, but
fixed the output when there are spurious files lying around that
contain spaces. For example "pop3 - Copy.c"

By including the offending source file in the project files the user
can then see the file and remove it if necessary.

projects/generate.bat

@@ -87,21 +87,21 @@ rem
     set "var=!var:*:=!"
 
     if "!var!" == "CURL_SRC_C_FILES" (
-      for /f %%c in ('dir /b ..\src\*.c') do call :element %1 src %%c %3
+      for /f "delims=" %%c in ('dir /b ..\src\*.c') do call :element %1 src "%%c" %3
     ) else if "!var!" == "CURL_SRC_H_FILES" (
-      for /f %%h in ('dir /b ..\src\*.h') do call :element %1 src %%h %3
+      for /f "delims=" %%h in ('dir /b ..\src\*.h') do call :element %1 src "%%h" %3
     ) else if "!var!" == "CURL_SRC_RC_FILES" (
-      for /f %%r in ('dir /b ..\src\*.rc') do call :element %1 src %%r %3
+      for /f "delims=" %%r in ('dir /b ..\src\*.rc') do call :element %1 src "%%r" %3
     ) else if "!var!" == "CURL_LIB_C_FILES" (
-      for /f %%c in ('dir /b ..\lib\*.c') do call :element %1 lib %%c %3
+      for /f "delims=" %%c in ('dir /b ..\lib\*.c') do call :element %1 lib "%%c" %3
     ) else if "!var!" == "CURL_LIB_H_FILES" (
-      for /f %%h in ('dir /b ..\lib\*.h') do call :element %1 lib %%h %3
+      for /f "delims=" %%h in ('dir /b ..\lib\*.h') do call :element %1 lib "%%h" %3
     ) else if "!var!" == "CURL_LIB_RC_FILES" (
-      for /f %%r in ('dir /b ..\lib\*.rc') do call :element %1 lib %%r %3
+      for /f "delims=" %%r in ('dir /b ..\lib\*.rc') do call :element %1 lib "%%r" %3
     ) else if "!var!" == "CURL_LIB_VTLS_C_FILES" (
-      for /f %%c in ('dir /b ..\lib\vtls\*.c') do call :element %1 lib\vtls %%c %3
+      for /f "delims=" %%c in ('dir /b ..\lib\vtls\*.c') do call :element %1 lib\vtls "%%c" %3
     ) else if "!var!" == "CURL_LIB_VTLS_H_FILES" (
-      for /f %%h in ('dir /b ..\lib\vtls\*.h') do call :element %1 lib\vtls %%h %3
+      for /f "delims=" %%h in ('dir /b ..\lib\vtls\*.h') do call :element %1 lib\vtls "%%h" %3
     ) else (
       echo.!var!>> %3
     )
@@ -129,26 +129,26 @@ rem
   if "%1" == "dsp" (
     echo # Begin Source File>> %4
     echo.>> %4
-    echo SOURCE=..\..\..\..\%2\%3>> %4
+    echo SOURCE=..\..\..\..\%2\%~3>> %4
     echo # End Source File>> %4
   ) else if "%1" == "vcproj1" (
     echo %TABS%^<File>> %4
-    echo %TABS%  RelativePath="..\..\..\..\%2\%3"^>>> %4
+    echo %TABS%  RelativePath="..\..\..\..\%2\%~3"^>>> %4
     echo %TABS%^</File^>>> %4
   ) else if "%1" == "vcproj2" (
     echo %TABS%^<File>> %4
-    echo %TABS%  RelativePath="..\..\..\..\%2\%3">> %4
+    echo %TABS%  RelativePath="..\..\..\..\%2\%~3">> %4
     echo %TABS%^>>> %4
     echo %TABS%^</File^>>> %4
   ) else if "%1" == "vcxproj" (
     call :extension %3 ext
 
     if "%ext%" == "c" (
-      echo %SPACES%^<ClCompile Include=^"..\..\..\..\%2\%3^" /^>>> %4
+      echo %SPACES%^<ClCompile Include=^"..\..\..\..\%2\%~3^" /^>>> %4
     ) else if "%ext%" == "h" (
-      echo %SPACES%^<ClInclude Include=^"..\..\..\..\%2\%3^" /^>>> %4
+      echo %SPACES%^<ClInclude Include=^"..\..\..\..\%2\%~3^" /^>>> %4
     ) else if "%ext%" == "rc" (
-      echo %SPACES%^<ResourceCompile Include=^"..\..\..\..\%2\%3^" /^>>> %4
+      echo %SPACES%^<ResourceCompile Include=^"..\..\..\..\%2\%~3^" /^>>> %4
     )
   )
 
@@ -160,7 +160,7 @@ rem %1 - The filename
 rem %2 - The return value
 rem
 :extension
-  set fname=%1
+  set fname=%~1
   set ename=
 :loop1
   if "%fname%"=="" (