Fix non-Windows build break in r8364.



git-svn-id: http://skia.googlecode.com/svn/trunk@8365 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/gl/GrGLCaps.cpp b/src/gpu/gl/GrGLCaps.cpp
index cf09506..1bf5036 100644
--- a/src/gpu/gl/GrGLCaps.cpp
+++ b/src/gpu/gl/GrGLCaps.cpp
@@ -45,7 +45,7 @@
     fIsCoreProfile = false;
 }
 
-GrGLCaps::GrGLCaps(const GrGLCaps& caps) {
+GrGLCaps::GrGLCaps(const GrGLCaps& caps) : GrDrawTarget::Caps() {
     *this = caps;
 }