[NOT PART OF THE DEFAULT BUILD] Fix compilation problems on Linux. The code now compiles there as well.

layout/mathml/base/src/nsMathMLContainerFrame.cpp

@@ -486,7 +486,7 @@ nsMathMLContainerFrame::GetReflowAndBoundingMetricsFor(nsIFrame*            aFra
     aBoundingMetrics.descent = aReflowMetrics.descent;
     aBoundingMetrics.ascent  = aReflowMetrics.ascent;
     aBoundingMetrics.width   = aReflowMetrics.width;
-#if 1
+#if 0
     printf("GetBoundingMetrics() failed for: "); /* getchar(); */
     nsFrame::ListTag(stdout, aFrame);
     printf("\n");
@@ -711,8 +711,7 @@ nsMathMLContainerFrame::EmbellishOperator()
     mEmbellishData.firstChild = firstChild;
     // Cache also the inner-most embellished frame at the core of the hierarchy
     nsIMathMLFrame* aMathMLFrame = nsnull;
-    nsresult rv = firstChild->QueryInterface(NS_GET_IID(nsIMathMLFrame), (void**)&aMathMLFrame);
-    NS_ASSERTION(NS_SUCCEEDED(rv) && aMathMLFrame, "Mystery!");
+    firstChild->QueryInterface(NS_GET_IID(nsIMathMLFrame), (void**)&aMathMLFrame);
     nsEmbellishData embellishData;
     aMathMLFrame->GetEmbellishData(embellishData);
     mEmbellishData.core = embellishData.core;
@@ -985,7 +984,7 @@ nsMathMLContainerFrame::InsertScriptLevelStyleContext(nsIPresContext* aPresConte
           PRBool isSmaller = PR_TRUE;
           if (0 > gap) { isSmaller = PR_FALSE; gap = -gap; } // absolute value
 
-          PRInt32 smallestFontSize, smallestFontIndex;
+          PRInt32 smallestFontIndex, smallestFontSize = 0;
           if (isSmaller) {
             // find the smallest font-size in this subtree
             smallestFontSize = FindSmallestFontSizeFor(aPresContext, childFrame);

layout/mathml/base/src/nsMathMLmactionFrame.cpp

@@ -110,7 +110,6 @@ nsMathMLmactionFrame::Init(nsIPresContext*  aPresContext,
                            nsIStyleContext* aContext,
                            nsIFrame*        aPrevInFlow)
 {
-  nsresult rv = NS_OK;
   nsAutoString value, prefix;
 
   // Init our local attributes

layout/mathml/base/src/nsMathMLmoFrame.cpp

@@ -319,7 +319,7 @@ nsMathMLmoFrame::InitData(nsIPresContext* aPresContext)
   else {
     // Get our outermost embellished container and its parent
     nsIFrame* aParent = this;
-    nsIFrame* embellishAncestor = this;
+    embellishAncestor = this;
     do {
       embellishAncestor = aParent;
       aParent->GetParent(&aParent);
@@ -704,8 +704,6 @@ nsMathMLmoFrame::Stretch(nsIPresContext*      aPresContext,
   if (!NS_MATHML_OPERATOR_HAS_EMBELLISH_ANCESTOR(mFlags)) {
 
     // Get the value of 'em'
-    nsStyleFont font;
-    mStyleContext->GetStyle(eStyleStruct_Font, font);
     nscoord em = NSToCoordRound(float(font.mFont.size));
 
     // Account the spacing

layout/mathml/base/src/nsMathMLmsubFrame.cpp

@@ -110,8 +110,8 @@ nsMathMLmsubFrame::Place(nsIPresContext*      aPresContext,
   PRInt32 count = 0;
   nsHTMLReflowMetrics baseSize (nsnull);
   nsHTMLReflowMetrics subScriptSize (nsnull);
-  nsIFrame* baseFrame;
-  nsIFrame* subScriptFrame;
+  nsIFrame* baseFrame = nsnull;
+  nsIFrame* subScriptFrame = nsnull;
   // parameter v, Rule 18a, Appendix G of the TeXbook
   nscoord minSubScriptShift = 0;