"Fix" compiler issue in SkRandomScalerContext

src/fonts/SkRandomScalerContext.cpp

Index: src/fonts/SkRandomScalerContext.cpp
diff --git a/src/fonts/SkRandomScalerContext.cpp b/src/fonts/SkRandomScalerContext.cpp
index 1f6fbe041ef0a9990d298afc8befeabb77791587..c555dd2294457012f5384bfcf0a0e840554c7083 100644
--- a/src/fonts/SkRandomScalerContext.cpp
+++ b/src/fonts/SkRandomScalerContext.cpp
@@ -60,7 +60,7 @@ void SkRandomScalerContext::generateAdvance(SkGlyph* glyph) {
 void SkRandomScalerContext::generateMetrics(SkGlyph* glyph) {
     // Here we will change the mask format of the glyph
     // NOTE this is being overridden by the base class
-    SkMask::Format format;
+    SkMask::Format format = SkMask::kARGB32_Format; // init to handle defective compilers
     switch (glyph->getGlyphID() % 4) {
         case 0:
             format = SkMask::kLCD16_Format;