Replace reinterpret_cast with safer or no cast

When casting types to one another in C++, the weaker the cast,
the better.

This change replaces instances of reinterpret_cast with static_cast
or no cast where it safe and correct to do so.

BUG=angleproject:2683

Change-Id: I99c9033614a65282ae1d78cf0f4b80fabd75877a
Reviewed-on: https://chromium-review.googlesource.com/1109396
Commit-Queue: Rafael Cintron <rafael.cintron@microsoft.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
diff --git a/src/compiler/translator/ShaderLang.cpp b/src/compiler/translator/ShaderLang.cpp
index e1f814b..d8aff5f 100644
--- a/src/compiler/translator/ShaderLang.cpp
+++ b/src/compiler/translator/ShaderLang.cpp
@@ -313,7 +313,7 @@
         return 0;
     }
 
-    return reinterpret_cast<void *>(base);
+    return base;
 }
 
 void Destruct(ShHandle handle)