Change uniform warning in glShaderContext to avoid spam

This changes the severity of the uniform warning to debug, to avoid spamming the console

panda/src/glstuff/glShaderContext_src.cxx

@@ -677,23 +677,24 @@ reflect_uniform(int i, char *name_buffer, GLsizei name_buflen) {
   _glgsg->_glGetActiveUniform(_glsl_program, i, name_buflen, NULL, &param_size, &param_type, name_buffer);
   GLint p = _glgsg->_glGetUniformLocation(_glsl_program, name_buffer);
 
+  if (GLCAT.is_debug()) {
+    GLCAT.debug()
+      << "Active uniform " << name_buffer << " with size " << param_size
+      << " and type 0x" << hex << param_type << dec
+      << " is bound to location " << p << "\n";
+  }
 
   // Some NVidia drivers (361.43 for example) (incorrectly) include "internal"
   // uniforms in the list starting with "_main_" (for example,
   // "_main_0_gp5fp[0]") we need to skip those, because we don't know anything
   // about them
   if (strncmp(name_buffer, "_main_", 6) == 0) {
-    GLCAT.warning() << "Ignoring uniform " << name_buffer << " which may be generated by buggy Nvidia driver.\n";
+    if (GLCAT.is_debug()) {
+      GLCAT.debug() << "Ignoring uniform " << name_buffer << " which may be generated by buggy Nvidia driver.\n";
+    }
     return;
   }
 
-  if (GLCAT.is_debug()) {
-    GLCAT.debug()
-      << "Active uniform " << name_buffer << " with size " << param_size
-      << " and type 0x" << hex << param_type << dec
-      << " is bound to location " << p << "\n";
-  }
-
   if (p < 0) {
     // Special meaning, or it's in a uniform block.  Let it go.
     return;